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Mineral Coating Systems


EverKote 300 coatings are waterborne inorganic paints and stains based on potassium silicate binders. Potassium silicate masonry paints have been in use for over a century to provide extremely durable, breathable color coatings on all types of mineralbased substrates, including stone, masonry, concrete and cement plaster (stucco).

Two standard grades of are available:

      Penetral Low Viscosity, SemiTransparent Stains

      Patinar Medium Viscosity, Opaque Coatings

      EverKote 300 coatings are stabilized, reactive formulations which form chemical bonds within the substrate to provide long term color retention and durability.


EverKote 300's potassium silicate binder is produced by fusing potassium carbonate with silica at high temperature. The result is a soluble silicate, which can be dissolved in water to produce a liquid "waterglass".

Although soluble silicates can be air dried to form a film, maximum water resistance, bond strength and long-term durability depend on chemical reactions with the substrate or added catalysts. Substrates with which silicates can react include:

    Calcium salts, typically found in Portland cement, lime and calcareous natural stones such as limestone and marble

    Silica, typically present in siliceous sandstones, silica sand, mortars, concrete and glass

    Ceramics, including brick and terra cotta

    Iron and other metals

When EverKote 300 is applied to suitable substrates, it penetrates and reacts to form a hard, insoluble silicate. It can also increase substrate hardness, particularly in cementitious materials. When applied to materials containing Portland cement, the silicate reacts with incompletely hydrated cement particles, converting unreacted calcium hydroxide (CaOH2 or hydrated lime) to harder calcium silicate hydrates.


EverKote 300 is available in over 900 standard colors. Custom colormatching is also available. Product dries to a flat (matte) finish..



    Moisture Resistant

    Does not contribute to growth of mold, algae or mildew

    Improves resistance to certain chemicals

    Durable and UVResistant; Does not yellow, fade or peel



    Vapor Permeability, ASTM E96 Wet Cup Method

    >99% (vs. Untreated Control)

    Tensile Bond Strength

    >125 psi; Cohesive Failure, 100% in Substrate

    Weather Resistance, ASTM G53-84

    1200 hours, No Breakdown, Loss of Adhesion, Fading or Checking


Always pretest a small, inconspicuous test area for color, adhesion and compatibility prior to large scale application. Allow up to 7 days cure time before judging final color. Previous treatments, including water repellents and chemical cleaning agents, and substrate composition can effect mineral coating reaction rates and appearance. Mineral coatings are natural materials and some color variation or shading is normal. Colors may tend to lighten somewhat with aging.

EverKote 300 is can be used in a one or two coat application. The first coat may be thinned with up to 10% demineralized water, followed by one or more undiluted EverKote 300 top coats. On porpous or rough substrates, however, product should be diluted as required to maintain target coverage rate. DO NOT OVERAPPLY. Allow a minimum 6 hours' drying time between coats. Extend drying time when subsrates are saturated or weather is cool and damp.

Surface Preparation

Surfaces to be treated must be clean, dry and free of dirt, dust, form oil, efflorescence, previous coatings (other than existing cement or silicate mineral coatings) and other materials which may hinder penetration and/or reaction with the substrate. Previous cementitious and silicate mineral coatings must be spot tested for compatibility in an inconspicuous area prior to large scale application.


Protect glass and other surfaces which are not intended to be coated by covering completely with polyethylene, sealing the edges continuously with heavy moisture resistant tape. Unprotected glass and other surfaces may be etched or "frosted" by contact with silicate coatings. This is a chemical reaction, which cannot be reversed by cleaning.

New Concrete, Stucco and Mortar must be allowed to cure for a minimum of 7 days prior to mineral coating application. For maximum effectiveness, surfaces must be sufficiently dry to allow the mineral coating to penetrate porous substrates. Allow extended drying time as required under cool, damp conditions.

Factors Affecting Penetration Depth

While penetration depth may not be critical for many architectural applications, greater penetration will have a significant effect on strength and durability of applications on cementbased substrates, porous stone and traffic bearing surfaces. Penetration depth is influenced by the substrate's pore structure and permeability, moisture content and surface preparation.


Mix product thoroughly before use as contents settle upon standing. Remix periodically during use to maintain consistent color and saturation.

Apply EverKote 300 by brush, roller or airless spray. Avoid product rundown. A thin, continuous film is required for nonporous substrates such as glazed terra cotta or hard stone.

Allow first coat to dry for a minimum of 6 hours before top coat application of EverKote 300. An additional minimum 6-hour period is required before application of a second top coat (optional).

Protection & Curing:

Protect coated surfaces from rain or other water exposure for at least 24 hours after application. Full cure requires at least 7 days, and colors may change in hue or intensity during this period. Do not expose treated surfaces to acid cleaners, hot water or steam cleaning.


Coverage rates can vary with surface texture and porosity. Maintain nominal coverage rate of 200 sq.ft./gal.per coat.


Edison Coatings, Inc. Products are manufactured in the United States of America from Components Originating in the United States, Canada, Italy, Germany, Spain, France, Australia, South Africa and South Korea.
BioLime NHL 3.5 Buff is a product of Italy. BioLime NHL 2, NHL 3.5 White and NHL 5.0 are Products of France. Marfil is a Product of Spain. SILAN-TREAT 88C is produced in Germany.

Copyright 2016, Edison Coatings, Inc. All rights reserved.

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Last Updated:

Thursday, December 17, 2015


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Edison Coatings, Inc. makes no warranties, express or implied, as to the accuracy or completeness of any of the information contained herein. This publication is offered on a complimentary basis as a service to potential customers or specifiers. While every effort has been made to include complete and accurate information, based on data and information believed to be reliable, it is the sole responsibility of the user to determine its suitability for his own intended use and purposes. Nothing contained herein shall be construed as a warranty or guarantee of any product, process or any other recommendation stated herein. Edison Coatings, Inc. assumes no responsibility for advice given, results obtained, or for any damages whether incidental or consequential, which may be incurred as a direct or indirect result of the use of this information. By proceeding to use this information, user acknowledges and agrees that he is doing so at his own risk, and user indemnifies and holds Edison Coatings harmless against any liabilities, costs or expenses resulting therefrom. All product sales are further governed by the Edison Coatings, Inc. CONDITIONS OF SALE.